2 Things.
You can look at those old athletes and bodybuilders that didn't know how to cycle "safely"
and/or you can look actual pro bodybuilders that know what are they doing to their bodies but they are paying with their health to achieve their goals and their dreams.
Plus you have the always present fact that "everybody reatcs different". So, actually we have hundreds of thousands of young people students, athletes, models people like we that cycle safely taking precautions. But actually we are not medical targets. Researchers and doctors look at big guys like Coleman, Cutler, ElSombaty, they probably have their hearts and liver fucked up, like the old guys that used seroids constantly, without stoping, without protectors and in the incorrect doses.